Insulating-block



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H. P. BALL.

INSULATING BLOCK.

N0. 523,653. Patented July 31, 1894..

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UNITED STATES PATENT OFFICE.

HENRY PRICE BALL, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE GENERALELECTRIC COMPANY, OF NEW YORK.

INSULATING-BLOCK.

SPECIFICATION forming part of Letters Iatent No. 523,653, dated July 31,1894.

Applicationfiled May 21, 1894:.

To all whom it may concern-.-

Be it known that I, HENRY PRICE BALL, a citizen of the United States,residing at Bridgeport, county of Fairfield, State of Connecticut, haveinvented certain new and useful Improvements in Insulating-Blocks, ofwhich the following is a specification.

This invention relates to insulating supporting blocks for the guard andspan wires of trolley roads.

The object of this invention is to provide an improvement'in insulating,guard wiresupporting blocks, by means of which the guard wire may bereadily removed for repairs. To this end an improved insulating guardwire block is provided, formed in sections which are readily separable,and are so constructed as to be held from slipping on each other, and atthe same time readily fitted together.

Referring to the accompanying drawings, Figure 1 is a side view inelevation of one of the sections of an insulating guard wireblock'constructed according to thisinvention. Figs. 2 and 3are planviews of the sections of an insulating block, showing the interiorconstruction thereof, and Fig. 4 is a transverse section in elevation ofa guard wire'insulating block, showing the sections fitted together.

A and B indicate respectively the sections of a guard wire insulatingblock constructed in accordance with this invention, each being formedwith a longitudinal groove C to form a passageway for the guard wire anda semi-circular projection D having at its ends extensions D and asemi-circular recess E having at its ends grooves E at an angle theretoand parallel with the groove C which, when the meeting faces of thesections A and B are brought together, are respectively opposed and fitinto each other, the projection l) and its extensions D on one sectionfitting 1nto the opposite recess E and its groove E on. the other, and aprojection D being on Serial No. 511,901- (No model.)

one side of a groove C while a recess E and its grooves E are on theother side of the groove C on the face of each section A and B. By meansof this construction the sections are readily interchangeable, and butone mold is required in manufacturing them, and the sections will beheld firmly in place when put together.

Liebite is a compound set forth in United States Letters Patent No.505,916, issued to Joseph Hoffman October 3, 1893.

What I claim is 1. As a new article of manufacture, a section of aninsultating guard wire block, formed on its face with a centrallongitudinal groove for the guard-wire, a semi-circular projection onone side of the longitudinal groove and having extensions paralleltherewith, a semi-circular recess on the other side thereof with groovesat its ends parallel with the longitudinal groove, the projections,extensions, recess and grooves, adapted to interlock with correspondingparts on an opposing section, and a groove on the back of the sectiontransverse to the guard-wire groove.

2. As a new article of manufacture, an insulating trolley guard wireblock formed in sections having on each of their meeting faces alongitudinal groove for the guard wire and semi-circular opposingprojections and recesses with extensions parallel with the guard wiregroove, on their meeting faces and on I opposite sides of the guard wiregrooves, the projection and its extensions on one face fitting into theopposing recess and its extensions on the opposite face, and span wiregrooves on the exterior of the blocks transverse to the guard wireblock.

In witness whereof Ihave hereunto set my hand this 15th day of May,1894.

HENRY PRICE BALL.

Witnesses:

O. E. CARPENTER, J. M. ZAPATA, Jr.

